I made a lot of videos with material testings and training with pimples. There are some individual highlights as the Ding Yi Special. You will find a lot of techniques with short and long pips in OX and with sponge.
*Ding Yi's material has not been approved by the ITTF since years. You can't use it at official tournaments
Hyo Won is a charismatic player and her matches are spectacular. The Korean Table Tennis Association made two videos with her. She describes techniques, foot work and tactics of the classic defense.
Alice Chang is a Malaysian defender. eBaTT (Eli Baraty Academy of Table Tennis) made a nice video with her about tactics against long pimples defenders.